Nut-lock.



No. 853,062. PATENIED MAY 7, 1907. G. S. CLARK.

NUT LOCK.

APPLICATION FILED BEPTIll. 1906.

; UNITED STATES PATENT OFFICE."

CQRNELIUS' s. CLARK, OF NORFOLK, VIRGINIA.

NUT-LOCK- Specification of Letters Patent.

Patented May 7, 1907.

Application filed September 11, 1906. Serial No. 334,168.

This invention relates to nut locks and the .object of the invention is to provide a nut lock in the manner as hereinafter set forth which will lock the nut upon the bolt and prevent the nut from working loose or becoming detached.

The invention further aims to provide a nut lock in the manner as hereinafter set forth which shall be simple in its construc- In describing the invention in detail refer-.

once is had to the accompanying drawings wherein like reference characters denote the corresponding parts throughout the, several views and in which- Figure 1 is a side elevation of a nut lock in accordance with this invention showing the same in a locking position. Figs. 2 and 2 are, respectively, a side and rear view of the nut. Figs. 3 and 3 are like views of the locking washer, and Fig. 4 is a side elevation or modified form of nut lock.

Referring .to the drawings by reference characters 1 designates a bolt of ordinary construction, on the threaded end 2 of which is applied a nut and a washer in accordance with this invention. The nut is indicated by the reference character 3 and has its inner face provided witha cylindrical boss 4, the periphery of which is uninterrupted and the said boss 4' is surrounded by a smooth and uninterrupted marginal portion 5 on the inner face of the nut 2. When the nut 3 is screwed home the boss 4 bears against one face of the object 6 to be clamped or locked in position so that between the object 6 and themarginal portion 5 which surrounds the boss 4 a recess is formed and in the said recess is positioned thelocking washer 7. The locking washer 7 consists of a flat ring having on one face thereof a pair of piercing barbs 8 which are arranged opposite each other, and

the said washer '7 has upon its opposite face a pair of piercing barli-s 9 which are arranged opposite each other, but the pair of piercing barks 9 are arranged at right angles with respect to the pair of piercing barbs 8. Each of the barbs 8 and 9 do not extend entirely across the washer 7, and when the washer 7 is in position, which is when surrounding the boss 4, and. when the nut 3 is screwed home the barlzs 9 bite the object 6, and the barls 8 bite in the marginal portion 5, consequently lockingthe nut to the sub-structure for the reason that the washer 7 is locked to the object 6. When the nut 3 is screwed home the washer assumes the position shown in Fig. 1, that is to say, it is bent in a torsional-manner. e

In the construction shown in Fig. 4 the bolt is indicated by the reference character 10, and the head of the bolt is formed with a boss 11 surrounded by a smooth marginal portion 12. In this construction the bolt carries a locking washer 13 as well as the nut. The nut is indicated by the reference character 14, its boss by the reference character 15 and its locking washer by the reference char acter 16. Each of the locking washers 13 and 16 are provided with two pairs of piercing barbs, one pair being indicated by the reference character 17, and the other pair by the reference character 18. By such an arrangement a double lock is provided, the bolt being prevented from movement owing to the biting of the barbs of the Washer 13 and the nut is prevented from movement owing to the biting of the barbs of the Washer 16.

In use, as is clearly shown in Fig. 1, it will be observed that the boss will have a directbearing against the face of the fish-plateor other object, thus sustaining the strain, While the washer has a slight yielding action between the fish-plate and nut, and the barbs enter the fish-plate or nut so as to prevent the nut from turning or working loose, and the enabling the parts to be firmly secured, the

upon the inner marginal the fish-plate or themarginal portion of the nut or bolt.

By the construction of nut and washer herein shown and described it will be seen that the inner end of the nut may be brought to bear directly a ainst the fishlate or other object to whic the bolt is applled, thus same being sustained entirely by the nut, while the yieldable Washer prevents the nut from turning backward or working loose, aid the same is true when'the bolt is provided with the locking washer for the reason that the boss of the bolt can bear a ainst the fishplate as well as, the boss of t e nut. When the double lock is used the strain is had upon the nut and boss of the bolt.

What I claim is i 1. A nut lock comprising a nut having one face thereof provided with a boss having a smooth and uninterrupted eriphery, saidboss surrounded by a smoot and uninterrupted marginal portion, and a flat, yieldable and circular washer mounted upon said boss and provided on each face with a pair of piercing barbs, the barbs upon one face arranged at an angle with respect to the barbs upon the other face, said barbs arranged v ortion of said washer and of a length less t an the width of the body portion of the washer.

provided on each face with a pair' of provided with a screw-threaded portion adapted to receive said nut and further hav-' 7 ing the head formed with aboss surrounded by a smooth marginal portion; and a yielda le washer mounted upon the boss of the nut, said washer having each of its faces provided with a pair of piercing barbs, the barbs upon one face ositioned at an angle with respect to the barbs of the other face, the barbs formed on the washer carried b the bolt arranged upon the inner margina ortion of said Washer and of a len th less t an [the Width of the body portion 0 the Washer.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

' CORNELIUS S. CLARK.

Witnesses:

EDMUND S. RUFFrN, LINNWOOD MALLORY. 

